(19)
(11) EP 0 878 811 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.03.1999 Bulletin 1999/09

(43) Date of publication A2:
18.11.1998 Bulletin 1998/47

(21) Application number: 98107639.1

(22) Date of filing: 27.04.1998
(51) International Patent Classification (IPC)6: H01F 38/14
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 15.05.1997 JP 125458/97

(71) Applicants:
  • SUMITOMO WIRING SYSTEMS, Ltd.
    Yokkaichi-shi, Mie (JP)
  • SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Osaka-shi, Osaka 541 (JP)

(72) Inventors:
  • Kuki, Heiji
    1-14 Nishisuehiro-cho Yokkaichi-shi, Mie (JP)
  • Watanabe, Kunihiko
    1-14 Nishisuehiro-cho Yokkaichi-shi, Mie (JP)
  • Shimada, Toshiro, c/o Sumitomo Electric Ind. Ltd
    Konohana-ku, Osaka-shi, Osaka (JP)

(74) Representative: R.A. KUHNEN & P.A. WACKER 
Patentanwaltsgesellschaft mbH Alois-Steinecker-Strasse 22
85354 Freising
85354 Freising (DE)

   


(54) Magnetic coupling device for charging electric car


(57) A C-shaped fixed core is provided at a power receiving portion, and a secondary coil is wound on a vertical portion of the fixed core. A moving core is vertically movable in sliding contact with distal end surfaces of horizontal portions of the fixed core. A primary coil, having an air core portion, is provided at a charging coupler. When the charging coupler is attached to the power receiving portion, the moving core is moved downward to extend through the air core portion of the primary coil, and opposite end portions of the moving core are contacted respectively with the horizontal portions of the fixed core. As a result, a magnetic circuit is formed between the primary and secondary coils. The charging coupler is lightweight since it does not have a core.






Search report